Pot as well as cigarettes do damage lung tissue, it is a proven fact according to the medical association, and it makes sense, breathing in any smoke aggravates the respiratory system.
But her friend should have her health checked out just to be safe that there are no lung infections, pneumonia, TB, you know, any of those nasties.
Good luck to y'all

DE

In giving advice seek to help, not please your friend
SOLON